Televised ducts under slab floor. Ducts are spiral wound galvanized metal showing signs of water and sand infiltration along with rusting. There was no standing water at the time of the inspection but water lines and debris was visible. Suggest possibly installing a pump on each side of building along with drain tile through the foundation wall to control the water issues. After water issues are resolved the ducts should be spin cast mortared then spray lined with Duct Armor duct lining material.